[Asterisk-Users] Fun with Echo

[Brian Swan]

Agree -- seems like a lot of latency.  The one thing I will say,  
however, is that I had excellent results using 256 taps, until I  
tried an *inbound* call, where the echo was so bad, it seemed like I  
had put in there on purpose. :)

Thanks!
Brian

On Jun 9, 2006, at 12:39 PM, Eric "ManxPower" Wieling wrote:

> The number of taps the EC has to deal with is the delay on the PSTN  
> side.  I can't imagine echo is more than a few ms in modern TDM  
> networks.  This latency has NOTHING to do with VoIP latency, since  
> the echo must be canceled BEFORE it gets to the VoIP side of things.
>
> Brian Swan wrote:
>> My wife is the customer, so she tends to give me funny looks when  
>> I ask her to sign waivers. ;) In all seriousness, though, I do  
>> recall reading that the 256 tap limit is "enforced" in software  
>> and that you can add/remove/whatever a few lines of code, and go  
>> up to 1024 (or greater I'd assume).  Has anyone tried this?  I'm  
>> considering attempting it this weekend to see if it does  
>> anything.  Does more taps always = better echo cancelation?
>
>
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